* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    background-color: #f9fafb;
    line-height: 1.6;
}

/* 页眉样式 */
.header {
    background: linear-gradient(to right, #1e3a8a, #1e40af);
    color: white;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.header-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Logo区域 */
.logo-section {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.head-logo {
    width: 128px;
    height: 48px;
    background: white;
    border-radius: 8px;
    padding: 6px;
    object-fit: contain;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.company-info h1 {
    font-size: 1.25rem;
    font-weight: bold;
    color: white;
    line-height: 1.2;
    margin-bottom: 2px;
}

.company-info p {
    font-size: 0.875rem;
    color: #bfdbfe;
}

/* 联系区域 */
.contact-section {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.phone-group {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.phone-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: white;
}

.phone-icon {
    width: 16px;
    height: 16px;
    fill: #bfdbfe;
}

.phone-item span {
    font-size:1.1rem;
    font-weight: 500;
}

/* 认证信息 */
.ts-certification {
    background: white;
    color: #1e40af;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    border: 1px solid #fbbf24;
    text-align: center;
}

.ts-title {
    font-size: 0.75rem;
    font-weight: 600;
    color: #d97706;
}

.ts-number {
    font-size: 0.875rem;
    font-weight: bold;
}

/* 导航菜单 */
.navigation {
    background: white;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    border-bottom: 1px solid #e5e7eb;
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.nav-menu {
    display: flex;
    justify-content: center;
}

.nav-item {
    display: block;
    padding: 0.75rem 1.5rem;
    color: #374151;
    text-decoration: none;
    font-weight: 500;
    border-bottom: 2px solid transparent;
    transition: all 0.2s ease;
}

.nav-item:hover {
    color: #2563eb;
    border-bottom-color: #2563eb;
}

.nav-item.active {
    color: #2563eb;
    border-bottom-color: #2563eb;
    background-color: #eff6ff;
}

/* 移动端联系信息 */
.mobile-contact {
    display: none;
    background: #eff6ff;
    padding: 0.5rem 1.5rem;
}

.mobile-contact-content {
    display: flex;
    justify-content: center;
    gap: 1rem;
    font-size: 0.875rem;
    color: #1e40af;
}

/* 主要内容 */
.main-content {
    min-height: 500px;
}

.content-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

.content-container > div {
    background: white;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    padding: 2rem;
}

.content-container h2 {
    font-size: 1.5rem;
    font-weight: bold;
    color: #1f2937;
    margin-bottom: 1rem;
}

.content-container p {
    color: #6b7280;
    line-height: 1.6;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }

    .contact-section {
        flex-direction: column;
        gap: 1rem;
        width: 100%;
    }

    .phone-group {
        display: none;
    }

    .mobile-contact {
        display: block;
    }

    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
    }

    .nav-item {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }

    .company-info h1 {
        font-size: 1.125rem;
    }

    .logo {
        width: 40px;
        height: 40px;
    }
}

@media (max-width: 480px) {
    .header-container {
        padding: 0.75rem 1rem;
    }

    .logo-section {
        flex-direction: column;
        gap: 0.5rem;
    }

    .company-info h1 {
        font-size: 1rem;
    }

    .company-info p {
        font-size: 0.75rem;
    }

    .nav-item {
        padding: 0.5rem 0.75rem;
        font-size: 0.8rem;
    }

    .content-container {
        padding: 1rem;
    }
}